I think it's being kept open as an example that there are too many people coming up with hair brained ideas to blow there money, when, as people, such as 37412 (who also happens to be 16, so there is no ageism here!) has said, £30 a month would be far better going to a preservation group rather than a person with no clue of finance or engineering skills wanting to buy some WNXX rust-bucket.
I am not saying this thread shouldn't be locked, as fair enough, it has digressed, but I find it a bit sad that the OP wanted it locked as soon as the replies weren't in support of his somewhat 'avant garde' idea.
Forums are for people discussing ideas and plans, and if people don't think the plans are sensible or rational, they are more than welcome to discuss that freely- whether the person who has chosen to post it likes it or not. At the end of the day, it's the OP's decision if he posts a thread in the first place or not, so he should take the rough with the smooth when it comes to replies. At the end of the day, everyone so far has just commented on the plans themselves, rather than made personal comments.
If you want something bad enough, have a go. If it is possible and you work hard enough so that it can be achieved, it will happen. BUT be prepared enough so that if it doesn't happen, you do not become discouraged - where there is a will there is a way.
That's all very well, but unfortunately, if this individual was to ring up DBS and ask to buy 37xxx, and pay £30 a month for rest of his life, they would probably laugh at him and/ or put the phone down. People can't be wrapped up in cotton wool and live life through rose-tinted spectacles. The harsh reality is that his plans are very unlikely, and it would probably give other prospective buyers a harder times if too many 'time wasting trainspotters' ring up asking if they can buy 37s with their pocket money. I've spoken to people at Booths in the past who have become almost 'anti-trainspotter' due the amount of 'passionate teenagers' people asking if they can buy this and that locomotive. If there are too many people like that, then it has the potential to put them off selling to enthusiast groups who are serious. No one wants that to happen.
There's also the cases where people have sadly spent their money on buying trains, only to realise it's a big mistake, and making them financially ruined.